Merge pull request #1433 from paroche/patch-57

Update article.md

Author: iliakan

1-js/09-classes/07-mixins/article.md

@@ -203,6 +203,6 @@ And `eventMixin` mixin makes it easy to add such behavior to as many classes as
 
 Some other languages allow multiple inheritance. JavaScript does not support multiple inheritance, but mixins can be implemented by copying methods into prototype.
 
-We can use mixins as a way to augment a class by multiple behaviors, like event-handling as we have seen above.
+We can use mixins as a way to augment a class by adding multiple behaviors, like event-handling as we have seen above.
 
-Mixins may become a point of conflict if they accidentally overwrite existing class methods. So generally one should think well about the naming methods of a mixin, to minimize the probability of that.
+Mixins may become a point of conflict if they accidentally overwrite existing class methods. So generally one should think well about the naming methods of a mixin, to minimize the probability of that happening.